Báo cáo lâm nghiệp: " Ranking the importance of quality variables for the price of high quality beech timber (Fagus sylvatica L ) ppt

... dispersion alone. The logs’ length might already reflect a part of the timber quality, since the higher the log quality, the longer it will be formed. One may argue that the comparison of r 2 of the present models ... econometric models to explain timber prices achieved for high quality beech timber (Fagus sylvatica L. ). The modelling starts wit...

Ngày tải lên: 08/08/2014, 00:22

... pest species is not the cause of damage at localities not suitable for small mammals (for example due to the lack of herbaceous cover) or at localities where rodents can use alternative attractive ... (H 200 2). No relationship was found between the intensity of threat to woody species by small mammals and altitude of the locality (P > 0.0 5). Only in th...

Ngày tải lên: 07/08/2014, 03:22

... unit yields of mixtures, and finally for yield indexes according to the rules of error transmission summarized by Š et al. (200 3). RESULTS AND DISCUSSION The annual unit yields of all tree ... official forest value in Slovakia were elaborated by T et al. (200 3). e paper first presents the methodological prin- ciples and the calculation concept of the prop...

Ngày tải lên: 07/08/2014, 10:21

... (0.2 4) 36.5 (3. 0) 32.9 (3. 2) 51.6 (4. 8) 383 (6 6) 48.7 (6. 2) LT-1 4.7 (0. 4) 17.8 (2. 9) 77.5 (3. 3) 22.0 (1. 9) 4.0 (0. 1) 55.8 (7. 9) 0.93 (0.1 1) 14.7 (2. 0) 19.7 (5. 4) 27.7 (4. 7) 225 (4 0) 26.3 (5. 2) LT- ... (1. 6) 44.7 (0. 5) 45.2 (1. 2) 43.5 (7. 0) 4.0 (0. 0) 84.2 (4. 4) 1.21 (0.1 6) 17.4 (1. 7) 11.7 (...

Ngày tải lên: 08/08/2014, 01:22

... level of tree canopy is registered with the use of a professional tool for the patch. e available light function describes the amount of light available for specific tree leaves and is calcu- lated ... random and available light on the ground level. e amount of new saplings is generated separately for each type of light tolerance. For the block of nutrients...

Ngày tải lên: 07/08/2014, 03:22

... was collected in the field during the inventory of the forests of the nature reserve Babia hora. The data were used for the calculation of CWD timber volume. In the next step, CWD timber volume ... volume of lying dead wood (logs) was calculated as the volume of a second degree paraboloid using Huber’s formula: v = h × g 1/2 ( 2) Where: v – volume of...

Ngày tải lên: 07/08/2014, 10:21

... volume of HCl consumed by air-dried soil controls (ml), V – volume of HCl consumed by soil samples with dif- ferent moisture levels (ml), C – concentration of hydrochloric acid standard solu- tion ... solu- tion (mol l –1 ), M – weight of air-dried soil (20 g in this study) (g). e soil accumulative C mineralization quantity equalled the sum of soil released CO 2 -C (g·air-...

Ngày tải lên: 07/08/2014, 10:21

... xylem mother cell divides to form two daughter cells, which in turn divide once, resulting in the formation of a set of four cells, all of which eventually mature into xylem cells. Phloem mother ... de- crease in the formation of these cells leads to the fact that the resulting number of cells is lower than in old trees.  e curve of the total number of newly form...

Ngày tải lên: 07/08/2014, 10:21

... Ca/Al molar ratio in soil water LH – under the humus horizon, L3 0 – at the depth of 30 cm of mineral soil, L5 0 – at the depth of 50 cm of mineral soil (in the European beech stand) Ca/Al current ... historically high air pollution load, mainly from the Třinec and Ostrava agglomeration. Air pol - lution significantly decreased in the second half of the 1990s. For...

Ngày tải lên: 07/08/2014, 10:21

... vascular bundle and sclerenchyma tissue Area of the central part of needle ( %) Area of the central part of needle/needle area ( %) Resin duct area ( %) Resin duct area/needle area ( %) Table ... separately. Needle length was analyzed using the Kruskal-Wallis test as the nonparametric analysis of variance be- cause of the violation of the assumptio...

Ngày tải lên: 07/08/2014, 10:21